Question 483774
Investment I	5.00%		per annum						
Investment II	7.00%		per annum						
									
x		+	y	10000	------------------------1				
5.00%	x	+	7.00%	y	=	$630.00			
Multiply by 		100							
5	x	+	7	y	=	$63,000.00		--------2	
									
Multiply (1) by			-5						
we get									
									
-5	x	-5	y	=		-50000.00			
									
Add this to (2)									
									
0	x	+2	y	=		$13,000.00			
									
divide by		2							
									
y	=$6,500.00	investment at 	7.00% 
Balance	$3,500.00 investment at 	5.00%
CHECK									
$3,500.00			$175.00						
$6,500.00			$455.00						
Total			$630.00